OSGi property annotations for cip app

Change-Id: I62a7afb0eaa469de173934cf4c19ccafd9935f51
diff --git a/apps/cip/src/main/java/org/onosproject/cip/ClusterIpManager.java b/apps/cip/src/main/java/org/onosproject/cip/ClusterIpManager.java
index 17259fd..fd8bb40 100644
--- a/apps/cip/src/main/java/org/onosproject/cip/ClusterIpManager.java
+++ b/apps/cip/src/main/java/org/onosproject/cip/ClusterIpManager.java
@@ -39,6 +39,12 @@
 
 import static com.google.common.base.Strings.isNullOrEmpty;
 import static org.onlab.util.Tools.get;
+import static org.onosproject.cip.OsgiPropertyConstants.ALIAS_ADAPTER;
+import static org.onosproject.cip.OsgiPropertyConstants.ALIAS_ADAPTER_DEFAULT;
+import static org.onosproject.cip.OsgiPropertyConstants.ALIAS_IP;
+import static org.onosproject.cip.OsgiPropertyConstants.ALIAS_IP_DEFAULT;
+import static org.onosproject.cip.OsgiPropertyConstants.ALIAS_MASK;
+import static org.onosproject.cip.OsgiPropertyConstants.ALIAS_MASK_DEFAULT;
 
 /**
  * Manages cluster IP address alias.
@@ -54,7 +60,14 @@
  * This will make sure that if the process is killed abruptly, the IP alias
  * will be dropped upon respawn.
  */
-@Component(immediate = true)
+@Component(
+    immediate = true,
+    property = {
+        ALIAS_IP + "=" + ALIAS_IP_DEFAULT,
+        ALIAS_MASK + "=" + ALIAS_MASK_DEFAULT,
+        ALIAS_ADAPTER + "=" + ALIAS_ADAPTER_DEFAULT
+    }
+)
 public class ClusterIpManager {
 
     private final Logger log = LoggerFactory.getLogger(getClass());
@@ -75,17 +88,14 @@
     private NodeId localId;
     private boolean wasLeader = false;
 
-    // By default there is no IP; this has to be configured
-    //@Property(name = "aliasIp", value = "", label = "Alias IP address")
-    private String aliasIp = "";
+    /** Alias IP address. */
+    private String aliasIp = ALIAS_IP_DEFAULT;
 
-    public static final String DEFAULT_MASK = "255.255.0.0";
-    //@Property(name = "aliasMask", value = DEFAULT_MASK, label = "Alias IP mask")
-    private String aliasMask = DEFAULT_MASK;
+    /** Alias IP mask. */
+    private String aliasMask = ALIAS_MASK_DEFAULT;
 
-    public static final String ETH_0 = "eth0:0";
-    //@Property(name = "aliasAdapter", value = ETH_0, label = "Alias IP adapter")
-    private String aliasAdapter = ETH_0;
+    /** Alias IP adapter. */
+    private String aliasAdapter = ALIAS_ADAPTER_DEFAULT;
 
     @Activate
     protected void activate(ComponentContext context) {
@@ -114,9 +124,9 @@
     protected void modified(ComponentContext context) {
         log.info("Received configuration change...");
         Dictionary<?, ?> properties = context != null ? context.getProperties() : new Properties();
-        String newIp = get(properties, "aliasIp");
-        String newMask = get(properties, "aliasMask");
-        String newAdapter = get(properties, "aliasAdapter");
+        String newIp = get(properties, ALIAS_IP);
+        String newMask = get(properties, ALIAS_MASK);
+        String newAdapter = get(properties, ALIAS_ADAPTER);
 
         // Process any changes in the parameters...
         if (!Objects.equals(newIp, aliasIp) ||
diff --git a/apps/cip/src/main/java/org/onosproject/cip/OsgiPropertyConstants.java b/apps/cip/src/main/java/org/onosproject/cip/OsgiPropertyConstants.java
new file mode 100644
index 0000000..c6bcb52
--- /dev/null
+++ b/apps/cip/src/main/java/org/onosproject/cip/OsgiPropertyConstants.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.cip;
+
+public final class OsgiPropertyConstants {
+    private OsgiPropertyConstants() {
+    }
+
+    static final String ALIAS_IP = "aliasIp";
+    static final String ALIAS_IP_DEFAULT = "";
+
+    static final String ALIAS_MASK = "aliasMask";
+    static final String ALIAS_MASK_DEFAULT = "255.255.0.0";
+
+    static final String ALIAS_ADAPTER = "aliasAdapter";
+    static final String ALIAS_ADAPTER_DEFAULT = "eth0:0";
+}